- Definition
A variable is like a placeholder, usually a letter, that stands for a number that can change. For example, in "x + 2 = 5," 'x' is the variable that represents the number 3.
In the problem 3 + ? = 5, the question mark is a variable holding the place for the number 2.
How to teach this in 30 seconds
Try this analogy: A variable is like an empty lunchbox where you can put a different snack each day.
Ask your child: If a box + 2 = 5, what number is hiding in the box?
Common mix-up: Kids might think the letter is just a confusing part of the problem. A variable is just a placeholder, like a blank space waiting for a number.
Examples
- In 8 - b = 6, 'b' is the variable that stands for the number 2.
- Using an empty box in an equation to stand for an unknown number.
variable is a term used in Ontario’s Kindergarten to Grade 8 curriculum.
Where this shows up
The descriptions on this page are SmartStudy’s own original, plain-language writing — not the Ministry’s wording. They are aligned to the Ontario Curriculum, © King’s Printer for Ontario. For the Ministry’s official wording, see the source link below. SmartStudy is an independent service and is not affiliated with, endorsed by, or sponsored by the Government of Ontario or the Ministry of Education. Ontario Curriculum and Resources ↗
